An experiment records the emission spectrum of atomic hydrogen as a series of sharp lines rather than a continuous band. Which statement most strongly supports the Bohr model over the classical planetary model?
(a) The wavelengths of the lines are integer multiples of a fundamental wavelength equal to the diameter of the atom.
(b) The energy of emitted photons corresponds to fixed differences between discrete electron energy levels.
(c) The brightness of each spectral line increases as the temperature of the gas rises.
(d) The overall intensity distribution of the spectrum follows a blackbody curve characteristic of the gas temperature.